JP6185444B2 - Nozzle for aerosol device and aerosol device - Google Patents

Description

  The present invention relates to a nozzle and an injection device including the nozzle.

  As an injection device for injecting a fluid over a wide range, an injection device including a nozzle having a plurality of injection holes is known (for example, see Patent Document 1 below). In such an injection device, compared with the case where the nozzle has only one injection hole, the fluid can be injected in a wider range by one operation.

JP 2000-325834 A

  However, conventionally, in an injection device including a nozzle having a plurality of injection holes, the injection amount and the injection angle of the fluid in each injection hole become non-uniform, and the fluid may not be uniformly injected from each injection hole. Moreover, the ejected matter from each injection hole may interfere with each other. In these cases, there has been a problem that the amount of fluid supply becomes uneven in the region where the fluid is ejected.

  In particular, when the fluid contains water, the viscosity of the fluid increases, and since the fluid and the liquefied petroleum gas as the propellant are difficult to be uniform, the fluid ejection is likely to be more non-uniform. On the other hand, in the past, the use of fluids containing water has been favored from the viewpoint of reducing the risk of formulation fires and considering environmental issues. There has been a demand for a device capable of performing the above. In particular, in the field of horticulture, fluids containing a large amount of water are preferred because they have little effect on plants. In addition, when a large amount of fluid adheres to a part of the plant body in the region where the fluid is ejected, there is a possibility that the influence on the plant body may increase, so an injection device that can spray uniformly over a wide range is desired. It has been rare. Therefore, for a nozzle having a plurality of injection holes, it is desirable that the fluid be uniformly injected from each injection hole.

  This invention is made | formed in view of the said subject, and it aims at providing the nozzle which can inject a fluid uniformly from several injection holes, and an injection apparatus provided with the said nozzle.

  As a result of intensive studies on the above problems, the inventors of the present invention have a nozzle in which a plurality of injection holes in which the hole diameter of the injection hole is the same and the height position of the injection hole in the vertical direction is different for each injection hole are arranged. In the above, it has been found that when fluid is ejected from each ejection hole, the fluid is not ejected uniformly from each ejection hole, in particular, the ejection mode of the lowermost ejection hole is likely to be disturbed. In order to solve this problem, it is effective for the inventors to make the hole diameter of the uppermost injection hole larger than that of the lowermost injection hole. It has been found that the above-mentioned problem can be solved when the diameter of each of the injection holes is larger than that, and even a fluid containing water can be uniformly injected.

  That is, the nozzle according to the present invention is a nozzle including an injection hole array in which a plurality of injection holes are arranged, and a flow path communicating with each of the plurality of injection holes. The diameter of the first injection hole located at one end is larger than the diameter of each of the other injection holes in the injection hole array.

  In this case, when fluid is ejected from each ejection hole in a state where the height position of the first ejection hole in the vertical direction is higher than the height position of each other ejection hole in the ejection hole array, It is possible to make the injection amount and the injection angle of the fluid uniform, and the fluid can be uniformly injected from each injection hole. Thereby, the supply amount of the fluid can be made uniform in the region where the fluid is ejected. Further, even a fluid containing water can be ejected uniformly.

  Although the reason why the above effect is obtained in the present invention is unknown in detail, the present inventors presume as follows. That is, when the fluid is ejected from each ejection hole in a state where the height position of the first ejection hole in the vertical direction is higher than the height position of each of the other ejection holes in the ejection hole array, Since the hole diameter of the holes is larger than the hole diameters of the other injection holes in the injection hole array, excessive pressure is released to the flow path, so that the pressure of the fluid supplied to the lowermost injection hole is applied to the flow path. On the other hand, it is presumed that the pressure of the fluid supplied to each injection hole is likely to be equalized by becoming an appropriate pressure. Thereby, it becomes easy to equalize the supply amount of the fluid in each injection hole, and it is estimated that the fluid can be uniformly injected from each injection hole.

  The nozzle according to the present invention further includes an introduction port that supplies the fluid ejected from the ejection hole to the flow path, and the introduction port includes the first ejection hole and the first ejection hole array. It is preferable that it is arranged at a position facing the region between the second injection holes adjacent to the injection holes. In this case, the amount of fluid supplied to each ejection hole is more easily uniformed, and the fluid is easily ejected uniformly from each ejection hole.

  The injection device according to the present invention includes the nozzle and a container that contains a fluid to be injected from the injection hole, and a height position of the first injection hole in a vertical direction is the height in the injection hole row. It is higher than the height position of each other injection hole. According to the ejection device according to the present invention, the fluid can be uniformly ejected from each ejection hole by using the nozzle. Thereby, the supply amount of the fluid can be made uniform in the region where the fluid is ejected.

  According to the present invention, fluid can be uniformly ejected from a plurality of ejection holes. Thereby, the supply amount of the fluid can be made uniform in the region where the fluid is ejected. Moreover, according to this invention, even if it is the fluid containing water, it can eject uniformly. Furthermore, according to the present invention, it is easy to suppress dripping that has been easy to occur in the past, particularly after ejecting a fluid containing water.

It is a perspective view which shows the injection apparatus which concerns on one Embodiment of this invention. It is a schematic cross section which shows the principal part at the time of cut | disconnecting the injection apparatus of FIG. 1 along the II-II line. It is a perspective view which shows the nozzle which concerns on one Embodiment of this invention. It is a front view which shows the nozzle which concerns on one Embodiment of this invention. (A) is a schematic cross section along the Va-Va line of FIG. 3, (b) is a schematic cross section along the Vb-Vb line of FIG. It is drawing which shows the result of an injection test. It is drawing which shows the result of an injection test.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the aerosol device (injection device) 1 according to the present embodiment includes an aerosol container 10, a cap 20, and a nozzle 30.

The aerosol container 10 is, for example, a hollow, substantially cylindrical container that extends in the vertical direction, and contains an aerosol agent. A valve stem 12 is disposed at the upper end of the aerosol container 10, and the aerosol agent in the aerosol container 10 is supplied to the nozzle 30 when the valve stem 12 is pushed down. The stem hole diameter of the valve stem 12 is preferably 0.3 mm or more, and more preferably 0.45 mm or more, from the viewpoint of easily suppressing dripping. The stem hole diameter of the valve stem 12 is preferably 1.2 mm or less and more preferably 0.6 mm or less from the viewpoint of excellent jetting stability. There may be a plurality of stem holes such as 2 to 3, and the diameters of the stem holes may be different. The total area of the stem holes, from the viewpoint of excellent stability of the injection is preferably 4.4 mm ² or less, more preferably 0.6 mm ² or less. The total area of the stem holes, from easily viewpoint to suppress dripping, preferably 0.07 mm ² or more, 0.16 mm ² or more is more preferable.

  The aerosol agent used in the present embodiment is obtained by mixing a stock solution mainly containing a drug and a solvent and a propellant.

  The stock solution in the aerosol used in the present embodiment is a composition containing a drug such as an insecticide and a solvent, and further containing a surfactant or the like as necessary.

Examples of the drug include insecticide chrysanthemum extract, natural pyrethrin, praretrin, imiprotorin, phthalthrin, allethrin, bifenthrin, resmethrin, phenothrin, ciphenothrin, permethrin, cypermethrin, etofenprox, cyfluthrin, deltamethrin, bifenthrin, fenvalerate, fenpropatoline, Pyrethroid insecticides such as empentrin, silafluophene, transfluthrin, metofluthrin, profluthrin; organophosphorus insecticides such as fenitrothion, diazinon, marathon, pyridafenthion, prothiophos, phoxime, chlorpyrifos, dichlorvos; carbaryl, propoxur, mesomil, thiodicarb Carbamate insecticides; oxadiazoles such as methoxadiazone Agents; phenylpyrazole insecticides such as fipronil; sulfonamide insecticides such as amidoflumet; neonicotinoid insecticides such as dinotefuran, imidacloprid and nitenpyram; pyrrole insecticides such as chlorfenapyr; eucalyptol, α-pinene, Geraniol, citronellal, camphor, linalool, p-menthane-3,8-diol, terpenol, dioctyl phthalate, dibutyl phthalate, diet, ethyl-butylacetylaminopropionate, 2-ethyl-1,3-hexadiol, Butyl-3,4-dihydro-2,2-dimethyl-4-oxo-2H-plan-6-carboxylate (indalon), n-hexyltriethylene glycol monoether, methyl-6-n-pentyl-cyclohexene-1 -Carbo Xylate, dimethyl phthalate, naphthalene, 2-ethyl-2-butyl-1,3-propanediol, 2,3,4,5-bis (Δ ₂ -butylene) tetrahydrofurfural, di-m-propylisocincomellonate 2- (4-ethoxyphenyl) -2-methylpropyl-3-phenoxybenzyl ether, 1-ethynyl-2-methyl-2-pentenyl-2,2-dimethyl-3- (2′-methyl-1′-) Propenyl) Cyclopropanecarboxylate, transfluthrin, metofluthrin, profluthrin and other pest repellents; Pests derived from natural products such as essential oils and extracts Such components. These drugs may be used alone or in combination of two or more.

  As a compound (synergist) that enhances the insecticidal efficacy of the insecticide, for example, piperonyl butoxide, octachlorodipropyl ether, N- (2-ethylhexyl) -1-isopropyl-4-methylbicyclo [2, 2,2] oct-5-ene-2,3-dicarboximide, isobornyl thiocyanoacetate, N- (2-ethynyl) -bicyclo [2,2,1] -hept-5-ene-2, 3-dicarboximide or the like may be used. These compounds may be only one type or two or more types.

  Examples of the solvent include water, alcohols (methanol, ethanol, isopropanol, ethylene glycol, ethylene glycol monomethyl ether, etc.), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.), esters (methyl acetate, ethyl acetate, acetic acid). Butyl), ethers (ethyl ether, etc.), aliphatic hydrocarbons (n-hexane, kerosene, kerosene, n-pentane, isopentane, cyclopentane, etc.) and the like. These solvents may be only one type or two or more types.

  Examples of the surfactant include sorbitan fatty acid esters such as sorbitan monooleate and sorbitan monolaurate; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monooleate; polyoxyethylene alkyl ethers such as polyoxyethylene nonylphenyl ether Polyglycerin fatty acid esters such as decaglycerin monooleate; polyoxyethylene hydrogenated castor oil, and the like. These surfactants may be only one type or two or more types. The surfactant is mainly used in combination with a solvent, and can be used for emulsifying, dispersing or solubilizing the drug. The amount added is affected by the affinity between the solvent and the drug, but for example, about 0.05 to 10 g may be added to 100 mL of the stock solution. As a solvent used in this embodiment, a mixed solvent of water and kerosene is preferable.

  Examples of the propellant include liquefied petroleum gas such as propane, propylene, n-butane, isobutane, butadiene, n-butylene, isobutylene, n-pentane, isopentane, n-hexane, isohexane, dimethyl ether, carbon dioxide gas, nitrogen gas, etc. Compressed gas or alternative chlorofluorocarbon gas. These propellants may be only one type or two or more types.

  Aerosols contain various additives such as inorganic powders, spreading agents, UV absorbers, UV reflectors, antioxidants, bactericides, fragrances, deodorants, and flavoring agents as needed. May be.

  The blending amount of the stock solution in the aerosol agent is, for example, 10 to 90% by volume. In the case of a mixed solvent of an aqueous phase stock solution (water, etc.) and an oil phase stock solution (kerosene, etc.), for example, the blending amount of the aqueous phase stock solution (water, etc.) is 5 to 99 g per 100 mL of the stock solution, and the blending amount of the surfactant is 0. 0.05 to 3 g, and the blending amount of the oil phase stock solution (such as kerosene) is preferably 1 to 95% by volume. The ratio (volume ratio) of the aqueous phase stock solution to the total amount of the aqueous phase stock solution and the oil phase stock solution is preferably 1% by volume or more, and more preferably 5% by volume or more from the viewpoint of the effect on the plant body. The ratio (volume ratio) of the aqueous phase stock solution to the total amount of the aqueous phase stock solution and the oil phase stock solution is preferably 95% by volume or less, more preferably 90% by volume or less, from the viewpoint of easily suppressing dripping. The ratio (volume ratio) of the stock solution to the stock solution (the total amount of the aqueous phase stock solution and the oil phase stock solution) and the total amount of the propellant is preferably 5 to 95% by volume, and more preferably 15 to 60% by volume. The blending amount of the propellant in the aerosol agent is, for example, 10 to 90% by volume. The compounding quantity of a chemical | medical agent is 0.1-10g per 100mL of stock solutions. The internal pressure (25 ° C.) of the aerosol container is preferably 0.15 to 0.6 MPa, and more preferably 0.3 to 0.5 MPa. 10-65 mL / 10 second is preferable and, as for the injection quantity (25 degreeC) of the aerosol agent in the aerosol apparatus 1, 30-55 mL / 10 second is more preferable.

  The cap 20 has a cover part 22 and an actuator part 24. The cover part 22 covers the upper end part of the aerosol container 10 and houses the actuator part 24. The actuator part 24 is supported by the cover part 22 in a swingable manner, and is engaged with the valve stem 12 from above. Inside the actuator section 24, a flow path 26 extending in the vertical direction and a flow path 28 communicating with the flow path 26 and extending in the horizontal direction are formed. The flow path 26 communicates with the inside of the aerosol container 10, and the flow path 28 communicates with the nozzle 30. When the actuator unit 24 is pushed down, the valve stem 12 is pushed down, whereby the aerosol agent in the aerosol container 10 is supplied to the nozzle 30 via the channel 26 and the channel 28.

  As shown in FIGS. 3 to 5, the nozzle 30 includes a flow channel cylinder 32, an introduction pipe 34, and an outer wall 36. The flow path cylinder 32 is a long member (flow path accommodating part) having a rectangular cross section, and is attached to the side surface of the cap 20 so as to extend in the standing direction (vertical direction) of the aerosol device 1. The length in the longitudinal direction of the nozzle 30 may be, for example, 40 to 220 mm, or 50 to 220 mm.

The channel cylinder 32 has a front surface 32a that is long in the longitudinal direction of the channel cylinder 32 and a back surface 32b that faces the surface 32a substantially in parallel. A flow path 38 is formed inside the flow path cylinder 32 along the longitudinal direction of the flow path cylinder 32. The lower end (downstream end) of the channel cylinder 32 is sealed by the sealing member 40, and the upper end (upstream end) of the channel cylinder 32 is The flow path cylinder 32 is shielded by a wall portion. Thereby, both ends of the flow path 38 are shielded. The cross section of the flow path 38 is substantially circular. The hole diameter of the flow path 38 may be, for example, 1 to 5 mm, or 3 to 5 mm. The cross-sectional area of the channel 38 is preferably 0.75~20mm ^2, 2.5~15.2mm ² is more preferable.

  A plurality of injection holes 42 (in this embodiment, five injection holes 42a to 42e) penetrating from the surface 32a to the flow path 38 are formed on the surface 32a. Communicating with The surface 32a has an injection hole array 44 in which a plurality of injection holes 42 are arranged. The plurality of injection holes 42 are arranged at regular intervals and in a line along the longitudinal direction (vertical direction) of the flow path cylinder 32 on the surface 32a, for example. The cross section of the injection hole 42 is substantially circular. The interval between the central axes of the adjacent injection holes 42 is, for example, 15 to 30 mm. If the distance between the central axes is 15 mm or more, the contents injected from the adjacent injection holes hardly interfere with each other, which is suitable for injection over a wide range.

  The hole diameter d1 of the injection hole (first injection hole) 42a located at one end of the injection hole array 44 is the same as that of each of the other injection holes (injection holes other than the injection holes 42a) 42b to 44e in the injection hole array 44. It is set larger than the hole diameters d2 to d5. In other words, in the injection hole row 44, the hole diameters d2 to d5 of the injection holes 42b to 42e are smaller than the hole diameter d1 of the injection hole 42a (d1> d2, d3, d4, d5). In the present embodiment, the injection hole 42a is disposed on the uppermost side in the standing direction (vertical direction) of the aerosol device 1, and the height position of the injection hole 42a in the vertical direction is higher than the height positions of the injection holes 42b to 42e. Is also expensive.

  The hole diameter d1 of the injection hole 42a is preferably 0.3 to 2 mm, and more preferably 0.5 to 1.5 mm. The hole diameters d2 to d5 of the injection holes 42b to 42e are preferably 0.2 to 2 mm, and more preferably 0.3 to 1.3 mm. The diameters of the injection holes 42b to 42e may be the same as each other or different from each other.

  A cylindrical peripheral wall 46 extending from the surface 32a in the injection direction (a direction perpendicular to the surface 32a and a direction perpendicular to the longitudinal direction of the flow path 38) is disposed around the injection hole 42 in the surface 32a. The inner diameter of the peripheral wall 46 is the same as the hole diameter of the injection hole 42. The length of the peripheral wall 46 in the injection direction is, for example, 1 to 3 mm.

  A cylindrical peripheral wall 48 extending from the surface 32 a in the injection direction is disposed around the peripheral wall 46 on the surface 32 a so as to be separated from the peripheral wall 46. The inner diameter of the peripheral wall 48 is, for example, 3.5 to 4.5 mm. The length of the peripheral wall 48 in the injection direction is, for example, the same as the length of the peripheral wall 46 in the injection direction. When the length of the peripheral wall 48 in the injection direction is the same as the length of the peripheral wall 46 in the injection direction, it is easy to suppress the occurrence of liquid dripping while suppressing interference with the injection.

  On the back surface 32 b of the channel cylinder 32, an introduction port 50 for supplying the aerosol agent injected from the injection hole 42 to the channel 38 is formed. The introduction port 50 is disposed at a position facing the region 52 between the injection hole 42 a and the injection hole (second injection hole) 42 b adjacent to the injection hole 42 a in the injection hole row 44. In this embodiment, the facing position of the introduction port 50 is located on the injection hole 42a side of the injection hole 42b in the region 52, and the introduction port 50 is closest to the injection hole 42a among the injection holes 42a to 42e. doing. The hole diameter of the inlet 50 is, for example, 1.5 to 2.5 mm.

  The introduction pipe 34 is a cylindrical long member and extends in the horizontal direction perpendicular to the longitudinal direction of the flow path 38. One end of the introduction pipe 34 is connected to the introduction port 50. The other end of the introduction pipe 34 communicates with the flow path 28. The inner diameter of the introduction tube 34 is, for example, 2.5 to 3.5 mm.

  The outer wall 36 includes a first outer wall part 36 a that covers the side surface of the flow path cylinder 32, and a second outer wall part 36 b that covers the upper part of the flow path cylinder 32. The outer wall portion 36a is connected to each of both ends of the surface 32a in the direction perpendicular to the longitudinal direction, and extends in a direction intersecting the surface 32a so as to cover the side surface of the flow path tube 32. The outer wall portion 36 b is connected to the respective upper end portions of the outer wall portion 36 a and is disposed so as to be separated from the flow path tube 32 through the gap portion 54.

  Since the aerosol apparatus 1 according to the present embodiment can perform uniform treatment over a wide range, it is pretreated on an outer wall, a floor, a bush, and the like, and repelling is performed to prevent a pest that lives outdoors from entering the indoor area. It is suitable for extinguishing pests such as cockroaches that live in the house due to residual effects after being treated on agents and floors. In particular, it is suitable for combating mosquitoes lurking in bushes and pests of beetles, aphids and slugs that inhabit plants. In addition, it can be used for stink bugs, sand turtles, stink bugs, ants, termites, flies, bees, brackish bugs, centipedes, gejigeji, spiders, millipedes, kamado, and the like.

  In the nozzle 30 of the aerosol device 1 according to the present embodiment, the hole diameter d1 of the injection hole 42a arranged on the uppermost side in the standing direction (vertical direction) of the aerosol device 1 is the other injection in the injection hole row 44. It is larger than the hole diameters d2 to d5 of the holes 42b to 42e. In this case, when injecting the aerosol agent from the injection holes 42a to 42e, it is possible to make the injection amount and the injection angle of the aerosol agent in the injection holes 42a to 42e uniform, and the aerosol agent is injected from the injection holes 42a to 42e. It can be sprayed uniformly. Thereby, in the area | region where the aerosol agent was injected, the supply amount of the aerosol agent can be equalize | homogenized.

  Further, in the nozzle 30, the introduction port 50 is disposed at a position facing the region 52 between the injection hole 42 a and the injection hole 42 b adjacent to the injection hole 42 a in the injection hole row 44. In this case, the aerosol agent is easily ejected uniformly from the ejection holes 42a to 42e.

  The present inventors have arranged the injection hole 42a on the uppermost side in the standing direction (vertical direction) of the aerosol apparatus 1, and the height position of the injection hole 42a in the vertical direction is higher than the height positions of the injection holes 42b to 42e. When the aerosol agent is injected from the injection holes 42a to 42e in a high state, the hole diameter d1 of the injection holes 42a is larger than the hole diameters d2 to d5 of the other injection holes 42b to 42e in the injection hole array 44. Since excessive pressure on the passage 38 is released, the pressure of the aerosol agent supplied to the lowermost injection hole 42e is supplied to the injection holes 42a to 42e such that the pressure is appropriate for the flow path 38. It is presumed that the pressure of the aerosol agent is easily made uniform. Thereby, the supply amount of the aerosol agent in the injection holes 42a to 42e is easily made uniform, and it is estimated that the aerosol agent can be uniformly injected from the injection holes 42a to 42e.

  Further, since the introduction port 50 is disposed at a position facing the region 52 between the injection holes 42a and 42b, the pressure of the aerosol agent supplied from the introduction port 50 to the flow path 38 is moderately increased. It is presumed that it will come out to the injection hole 42a. As a result, excessive pressure on the flow path 38 is easily released, so that the pressure of the aerosol agent supplied to the lowermost injection hole 42e is likely to be appropriate pressure on the flow path 38, etc. It is estimated that the supply amount of the aerosol agent supplied to 42a to 42e is more easily uniformized. Therefore, it is presumed that the supply amount of the aerosol agent in the injection holes 42a to 42e is more easily uniformed, and the aerosol agent is easily injected uniformly from the injection holes 42a to 42e.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the number of injection holes is not limited to five, and it is only necessary that the nozzle has an injection hole array in which two or more injection holes are arranged. Further, the intervals between the injection holes may be different from each other. In addition, the arrangement of the injection holes is not limited to the arrangement of the above embodiment.

  In the injection device, the plurality of injection holes are not limited to being arranged along the vertical direction, and for example, the injection holes are arranged along the vertical direction by inclining the injection hole row with respect to the vertical direction. The height position in the vertical direction of each injection hole may be different.

  The position of the inlet that supplies the fluid to the flow path of the nozzle is not limited to the position of the above-described embodiment, and may be a position that faces a region between arbitrary injection holes. In the flow path of the nozzle, a spacer may be disposed along the central axis of the flow path from the viewpoint of adjusting the volume in the flow path.

  The fluid ejected from the nozzle orifice may be any of gas, liquid, and a mixture thereof, and may be a mixture of solid and gas such as inorganic powder and organic powder. Further, the fluid is not limited to the aerosol agent. For example, the form of the hand pump which does not contain a propellant may be sufficient.

  Hereinafter, the present invention will be described specifically by way of examples. However, the present invention is not limited to the following examples.

<Experiment A>
45 mL of an oil phase stock solution, 135 mL of an aqueous phase stock solution and 270 mL of a propellant were mixed to prepare 450 mL of an aerosol agent as a test specimen. As an oil phase stock solution, a stock solution containing 0.7 g of transfluthrin, 6.0 g of sorbitan monolaurate per 100 mL of the oil phase stock solution, and No. 1 kerosene as a solvent was used. Purified water was used as the aqueous phase stock solution. Liquefied petroleum gas (0.39 MPa, 25 ° C.) was used as a propellant.

As Example A1, an aerosol device having the same configuration as the aerosol device 1 was prepared. The hole diameter of the nozzle injection hole was set as shown in Table 1 below. The interval between the central axes of the adjacent injection holes was 19 mm. The nozzle dimensions were as follows:
The length of the nozzle 30 in the longitudinal direction: 90 mm
Hole diameter of flow path 38: 4 mm
Hole diameter of introduction port 50: 2 mm
Inner diameter of introduction tube 34: 3 mm
The length of the peripheral wall 46 in the injection direction: 2 mm
Inner diameter of peripheral wall 48: 4 mm
The length of the peripheral wall 48 in the injection direction: 2 mm
Width of the surface 32a of the flow path cylinder 32: 13 mm

  Moreover, as Comparative Examples A1 to A3, aerosol apparatuses having the same configuration as the aerosol apparatus of Example A1 were prepared except that the diameters of the nozzle injection holes were different. The hole diameter of the nozzle injection hole was set as shown in Table 1 below.

The test specimen was accommodated in an aerosol container of each aerosol device. The specifications of the aerosol device were as follows.
Can: Tin can with φ65.2mm, height 195mm Valve: Stem hole diameter φ0.45mm × 2
Housing Under tap hole diameter: φ2.2mm, vapor tap hole diameter: none Internal pressure: 0.39 ± 0.05 MPa (25 ° C.)
Injection volume: 45 mL / 10 seconds (25 ° C.) (3 samples, average value for 3 injections each)

  After the aerosol apparatus was left at 25 ° C., the aerosol apparatus was shaken well immediately before the test and sprayed for about 5 seconds in a fume hood. About 1 second after the start of injection, it was confirmed that the injection state was stable, and a photograph near the nozzle was taken.

  The results of the injection test using each aerosol device are shown in Table 1 and FIGS. FIG. 6A shows the test result of Example A1, FIG. 6B shows the test result of Comparative Example A1, FIG. 7A shows the test result of Comparative Example A2, and FIG. These are the test results of Comparative Example A3.

  As is apparent from FIGS. 6 and 7, in Example A1 in which the diameter of the injection hole located at one end of the injection hole array is larger than the diameter of each of the other injection holes in the injection hole array, It can be confirmed that a uniform injection mode is obtained in the injection holes. On the other hand, in Comparative Examples A1 to A3 that do not use the nozzle having such a configuration, a uniform injection mode is not obtained. Specifically, in Comparative Example A1 and Comparative Example A2, the injection amount from the injection hole 42e is large, and the injection amount from the injection hole 42d is small. In Comparative Example A3, the injection amount from the injection hole 42e is large. In such comparative examples A1 to A3, it can be confirmed that the injection mode of the lowermost injection hole 42e is disordered, and the space between the injection hole 42e and the adjacent injection hole 42d is narrowed, and the processing is performed on a wide surface. It can be seen that unevenness occurs when the operation is performed.

○: Injection from each injection hole was uniform.
X: Injection from each injection hole was non-uniform.

<Experiment B>
The oil phase stock solution and the propellant were mixed to prepare 450 mL of an aerosol as a test specimen. As an oil phase stock solution, a stock solution containing 0.7 g of transfluthrin, 6.0 g of sorbitan monolaurate per 100 mL of the oil phase stock solution, and No. 1 kerosene as a solvent was used. Liquefied petroleum gas was used as a propellant. The volume ratio of the stock solution (oil phase stock solution) and the propellant was set as shown in Table 2 below.

  The aerosol of Example A1 above, except that the number of injection holes is three and a spacer (cylindrical shape with a diameter of 2 mm) is disposed along the central axis of the flow path 38 over the entire length of the flow path 38. An aerosol device (length in the longitudinal direction of the nozzle 30: 55 mm) having the same configuration as the device was prepared. The diameters of the nozzle injection holes were set to 1.0 mm at the top, 0.8 mm at the middle, and 0.8 mm at the bottom.

  The test specimen was accommodated in an aerosol container of each aerosol device. The specifications of the aerosol device were set in the same manner as in Experiment A above.

  After leaving the aerosol device at 25 ° C, shake the aerosol device well just before the test, inject for about 5 seconds in the fume hood, and confirm that the injection state is stable about 1 second after the start of injection. The injection state of the hole was confirmed. The case of normal injection was evaluated as “◯”, and the case of normal injection was evaluated as “x”. As shown in Table 2, it was confirmed that the injection was normally performed in any of the injection holes of Examples B1 to B5.

<Experiment C>
45 mL of an oil phase stock solution, 135 mL of an aqueous phase stock solution and 270 mL of a propellant were mixed to prepare 450 mL of an aerosol agent as a test specimen. As an oil phase stock solution, a stock solution containing 0.7 g of transfluthrin, 6.0 g of sorbitan monolaurate per 100 mL of the oil phase stock solution, and No. 1 kerosene as a solvent was used. Purified water was used as the aqueous phase stock solution. Liquefied petroleum gas (0.39 MPa, 25 ° C.) was used as a propellant.

  An aerosol device having the same configuration as the aerosol device of Example A1 was prepared. The test specimen was accommodated in an aerosol container of each aerosol device. The specifications of the aerosol apparatus were set in the same manner as in Experiment A except that the stem hole diameter was set as shown in Table 3 below.

  After leaving the aerosol device at 25 ° C., shake the aerosol device well immediately before the test, inject for about 5 seconds in the fume hood, and confirm that the injection state is stable one second after the start of injection. The injection state of each and the presence or absence of dripping of each injection hole after injection were evaluated. The case where the liquid is normally ejected and no dripping occurs is evaluated as “◯”, the case where the liquid is normally ejected but dripping occurs is evaluated as “Δ”, and the case where the liquid is not normally ejected is evaluated as “×”. ". As shown in Table 3, it was confirmed that in any of the injection holes of Examples C1 and C2, the liquid was normally injected and no dripping occurred.

<Experiment D>
An oil phase stock solution, an aqueous phase stock solution and a propellant were mixed to prepare 450 mL of an aerosol as a test specimen. As an oil phase stock solution, a stock solution containing 0.7 g of transfluthrin, 6.0 g of sorbitan monolaurate per 100 mL of the oil phase stock solution, and No. 1 kerosene as a solvent was used. Purified water was used as the aqueous phase stock solution. Liquefied petroleum gas (0.39 MPa, 25 ° C.) was used as a propellant. The volume ratio of the aqueous phase stock solution and the oil phase stock solution, and the volume ratio of the stock solution (total amount of the oil phase stock solution and the aqueous phase stock solution) and the propellant were set as shown in Table 4 below.

  An aerosol having the same configuration as the aerosol device of Example A1 except that the number of injection holes is three and, in some cases, a spacer (diameter: 2φ) is disposed along the central axis of the flow path 38. An apparatus (length in the longitudinal direction of the nozzle 30: 55 mm) was prepared. The diameters of the nozzle injection holes were set to 1.0 mm at the top, 0.8 mm at the middle, and 0.8 mm at the bottom.

  The test specimen was accommodated in an aerosol container of each aerosol device. The specifications of the aerosol device were set in the same manner as in the experiment A except that the internal pressure and the stem hole diameter were set as shown in Table 4 below.

  Similar to Experiment C above, the injection state of each injection hole and the presence or absence of liquid dripping in each injection hole after injection were evaluated. As shown in Table 4, it was confirmed that the injection was normally performed in any of the injection holes of Examples D1 to D11. In Examples D1 to D3, D5 to D9, and D11, it was also confirmed that no dripping occurred.

  DESCRIPTION OF SYMBOLS 1 ... Aerosol apparatus (injection apparatus), 10 ... Aerosol container, 30 ... Nozzle, 38 ... Flow path, 42, 42a, 42b, 42c, 42d, 42e ... Injection hole, 44 ... Injection hole row, 50 ... Inlet port, 52 ... area, d1, d2, d3, d4, d5 ... hole diameter.

Claims (2)

An injection hole array in which at least three injection holes are arranged;
And communicating to and flow ends that are shielded path respective front Ki噴 Iana,
An inlet for supplying the fluid ejected from the ejection hole to the flow path;
Equipped with a,
The injection hole diameter of the first injection hole located at one end of the hole array is much larger than the diameter of each of the other injection holes in the injection hole row,
For the aerosol apparatus, the introduction port is disposed at a position facing a region between the first injection hole and a second injection hole adjacent to the first injection hole in the injection hole row. nozzle. A nozzle for an aerosol device according to claim 1 ;
A container for containing fluid ejected from the ejection holes;
With
The aerosol apparatus, wherein a height position of the first injection hole in the vertical direction is higher than a height position of each of the other injection holes in the injection hole row.